- Latitude: 42.0
- Longitude: -87.5
High Temperatures
On April 30 in this location the average high temperature is 62.1 °F (16.7 °C). The lowest recored high temperature was 42.1 °F (5.6 °C) in 1956 and the highest recored high temperature was 84.9 °F (29.4 °C) in 1962. The high temperature is usually* between 55.1 °F (12.8 °C) and 69.0 °F (20.6 °C). About a quarter of the time, the high temperature is less than 55.1 °F (12.8 °C), and another quarter of the time, the high temperature is greater than and 69.0 °F (20.6 °C). About 95% of the time, the high temperature has been between 41.8 °F (5.5 °C) and 82.3 °F (27.9 °C).
Low Temperatures
On April 30 in this location the average low temperature is 45.4 °F (7.4 °C). The lowest recored low temperature was 34.0 °F (1.1 °C) in 1969 and the lowest recored low temperature was 64.9 °F (18.3 °C) in 1970. The low temperature is usually* between 41.0 °F (5.0 °C) and 49.8 °F (9.9 °C). About a quarter of the time, the low temperature is less than 41.0 °F (5.0 °C), and another quarter of the time, the low temperature is greater than and 49.8 °F (9.9 °C). About 95% of the time, the low temperature has been between 32.7 °F (0.4 °C) and 58.1 °F (14.5 °C).
Frost
On April 30 in this location expect the temperatures to drop below freezing for a risk of frost about 1.9% of the time.
Data Source(s)
The data used to compute the average high/low temperatures for this location were taken from the following stations:
- CHICAGO — Integrated Surface Dataset (ISD) station ID: 997338 — from year 2005 to 2025
- NORTHERLY ISLAND — Integrated Surface Dataset (ISD) station ID: 998499 — from year 2013 to 2025
- FOSTER AVE CHICAGO — Integrated Surface Dataset (ISD) station ID: 998497 — from year 2015 to 2019
- CHICAGO/MEIGS — Integrated Surface Dataset (ISD) station ID: 725346 — from year 2000 to 2002
- CHICAGO/MEIGS — Integrated Surface Dataset (ISD) station ID: 725346 — Weather Bureau Army Navy (WBAN): 94866 — from year 1973 to 1999
- NAVAL AIR STATION — Integrated Surface Dataset (ISD) station ID: 725306 — Weather Bureau Army Navy (WBAN): 14855 — from year 1973 to 1994
- WILMETTE (MARINES)& — Integrated Surface Dataset (ISD) station ID: 725307 — from year 1976 to 1994
- WILMETTE (CGS) — Integrated Surface Dataset (ISD) station ID: 722417 — from year 1988 to 1990
- NAVAL AIR STATION — Weather Bureau Army Navy (WBAN): 14855 — from year 1945 to 1972
- CHICAGO MEIGS FIELD — Weather Bureau Army Navy (WBAN): 94866 — from year 1966 to 1970
- DUNNE CRIB IL. — Integrated Surface Dataset (ISD) station ID: 744650 — from year 1944 to 1944